Surprisingly, Zeus' fighting style in "Record of Ragnarok" does not revolve around lightning, storms, or wind, despite being the Greek god of the sky (via Record of Ragnarok Wiki). Instead, Zeus is more of a straight-up brawler. His withered, elderly physique belies an unfathomable reservoir of strength and speed which was enough to out-perform Adam's superior endurance and "Eyes of God" ability (which allows him to detect and copy any movement he sees. He was even able to overcome the combined strength of Shiva, Heracles, and Ares.
In his normal state, Zeus is already incredibly strong, but if he happens to encounter a particularly powerful opponent, the god has a second form which drastically increases his power. In this form, known as "Adamas," Zeus concentrates all of his power into every movement. The god can only maintain this form for a short time, but during that time he can perform his most powerful techniques. Shiva even stated that the form made Zeus strong enough to destroy Heaven itself.
Zeus' most powerful ability, the Fist that Surpassed Time, is so blindingly fast that it brings time to a near halt. Zeus copied the ability from the God of Time, Kronos during the war against the Titans. Even without it, however, Zeus' True Gods Right/Left, Meteor Jabs, and Divine Axe kick all prove to be more than most would bargain for. All together, Zeus' abilities justify his stature amongst all gods.
